<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>算数运算符</title>
</head>
<body>
    <button onclick="fun">加法</button>
    <button>减法</button>
    <button>乘法</button>
    <button>除法</button>
    <button>幂运算</button>
    <button>取余</button>
</body>
</html>